Your cPanel displays your free space and bandwidth for reseller account. It means we give extra 200 MB space and extra 2000 MB bandwidth for your main account free of charge, so you don't need to waste your "reseller's space" to host your main account.
To assign more space and bandwidth to your main account, login to your WHM and create a new package for main account. Click "Upgrade/Downgrade an Account" under "Account Functions" menu, select your main account and new package.
If you want to check how much space do you have for hosting youir client accounts, please simply log in to your WHM and click "Create a New Account". You will see available space and bandwidth.